I see that the plugin has a hook into the register page (register_form and register_post actions). Is there a way to link this functionality to a form that is not the registration form? That is, I want a separate sign-un form with a bunch of custom and standard fields that I would like to put into a constant contact database.

Hello:
I also would like to have options for including custom fields. Currently, I hard coded a text box for city and country into your widget api under the label City. But it would be much better to have Country as a drop down list that submits country codes to Constant Contact. Can you provide an example of how such an option would be hard coded into the widget api? Right now I use your short code to insert a form onto a custom page.

You can already add a signup form with custom fields but the countries and states are not supported correctly at the moment, constant contact provide the lists we can use so should not be hard to add this.